function channelFromAlias($alias) { if (!$this->initialized) { return parent::channelFromAlias($alias); } if (file_exists($this->getAliasFile($alias))) { return file_get_contents($this->getAliasFile($alias)); } if (file_exists($this->getChannelFile($alias))) { return $alias; } throw new Exception('Unknown channel/alias: ' . $alias); }